{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "In the normal - sodium group the highest mean potassium deficit was 176 mmol on day 9 , after which some potassium was regained ; in the low - sodium group the highest deficit was 276 mmol on day 13 ."}
{"Chemical": ["sodium", "potassium"], "Disease": []}